Beziehungen zwischen dem Fett- und Glykogengehalt von Ascaris-Larven und der Dauer ihrer Infektionsf�higkeit

Nemata: The Roundworms Adenophorean Nematodes

“…In embryonated eggs of Ascaris, only a slight reduction of fats occurs after 2 years of storage at room temperature, and the fat reserves are exhausted only after 4 years (Münnich, 1965), but in the eggs of Ascaridia galli, an intestinal parasite of chickens, most fats are depleted within 10 months (Elliott, 1954). A theory advanced by Engelbrecht and Palm (1964) states that the short-lived larval stages of helminths such as miracidia, cercariae, oncospheres, coracidia, and the larvae of the pinworm, Enterobius vermicularis, depend principally on stored glycogen as the energy source, but long-lived ones, such as ascarid larvae, store and utilize lipids primarily.…”